US Highway 85 over South Fork Green River
Billings County, North Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US Highway 85 over South Fork Green River in Billings County, North Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1940 and reconstructed in 1971, making it 85 years old at the 2025 inventory.
- It carries about 1,090 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 21 of the 60 inventoried bridges in Billings County rated fair (35.0%); 2 (3.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: culvert 5 to 6.
- Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (47.07119, -103.20187)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 5 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 30 ft |
| Location | 12 North Jct. I-94 |
| NBI structure number | 0085088002 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Dakota department of transportation.
Busiest bridges in Billings County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 94 over Sheep Creek | 1964 | 2,600 | Fair |
| Interstate 94 over West River Rd. Int. | 1968 | 1,525 | Fair |
| Interstate 94 over West River Rd. Int. | 1968 | 1,525 | Fair |
| Interstate 94 over Little Missouri R. | 1964 | 1,300 | Fair |
| Interstate 94 over Little Missouri R. | 1964 | 1,300 | Fair |
| Interstate 94 over Sheep Creek | 1964 | 1,300 | Fair |
All bridges nearby: Billings County, ND bridge conditions · every bridge in Billings County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.